Table 4.

Summary of studies examining rule selection in PD

Source	Task	Patient sample	Result
Channon, 1997	Unidimensional classification learning	21 PD	PD < NC d=.62
Channon, Jones, & Stephenson, 1993	Unidimensional classification learning	12 PD; Stages 2–3, M=2.75	PD < NC; (d=.64) PD tested fewer correct hypotheses
Filoteo, Maddox, Ing, & Song, 2007	Classification learning (uni-dimensional, conjunctive or disjunctive rules)	12 PD; M=1.8	unidimensional rule: PD < NC other rules: PD = NC
Filoteo, Maddox, Salmon, Song, 2005	Unidimensional classification learning tasks	19 PD; M=1.7	<2 irrelevant dimensions: PD = NC >2 irrelevant dimensions: PD < NC
Gauntlett-Gilbert, Roberts & Brown, 1999	Learned irrelevance shift on ID/ED task	10 PD Stages 1–3; M=2.25	PD < NC
Lewis, Slabosz, Robbins, Barker, & Owen, 2004	Learned irrelevance shift on ID/ED task	20 PD; M = 1.9 Compared ON and OFF	PD_ON < NC PD_OFF < NC
Owen et al., 1993	Learned irrelevance shift on ID/ED task	26 PD_OFF (stages 1–3) 23 PD_ON (stages 1–4)	PD_ON < NC PD_OFF < NC
Price, 2006	Multidimensional classification learning	17 PD Stages 1–4, M = 2.3	PD < NC
Slabosz et al., 2006	Learned irrelevance shift on ID/ED task	20 PD M = 1.9 compared ON and OFF	PD_ON < NC PD_OFF < NC
Swainson, et al., 2006	Five Dimension Task (Swainson & Robbins, 2001)	11 mild PD_OFF 27 mild PD_ON 14 severe PD_ON	Mild PD_OFF = NC Mild PD_ON < NC Severe PD_ON < NC